A refrigeration system operates with refrigerant 134a. At the outlet of the valve of throttling a saturated mixture is obtained (Liquid-vapor) Calculate the quality or title (x) at the outlet of the throttle valve. a) 0.3387 b) 0.8922 c) 0.2506 d) 0.4276 Calculate the coefficient of performance (COP) of the cycle. a) 6,256 b) 3,805 c) 2,895 d) 3,305